Wherever men do things, other men will arise who will explain to them how things should be done.

Nature has never read the Declaration of Independence. It continues to make us unequal.

A great civilization is not conquered from without, until it has destroyed itself from within. The essential causes of Rome's decline lay in her people, her morals, her class struggle, her failing trade, her bureaucratic despotism, her stifling taxes, her consuming wars.

All that is good in our history is gathered in libraries. At this moment, Plato is down there at the library waiting for us. So is Aristotle. Spinoza is there and so is Kats. Shelly and Byron adn Sam Johnson are there waiting to tell us their magnificent stories. All you have to do is walk in the library door and the great company open their arms to you. They are so happy to see you that they come out with you into the street and to your home. And they do what hardly any friend will-- they are silent when you wish to think.

Tolerance grows only when faith loses certainty; certainty is murderous.

Does history warrant the conclusion that religion is necessary to morality - that a natural ethic is too weak to withstand the savagery that lurks under civilization and emerges in our dreams, crimes and wars? ... There is no significant example in history, before our time, of a society successfully maintaining moral life without the aid of religion.

Moral codes adjust themselves to environmental conditions.